Mechanism for removing treated materials from driers and the like.



w. R. MACKLIND MECHANISM FOR REMOVING TREATED MATERIALS FROM DRIERS ANDTHE LIKE.

APPLICATION FILED 0011.2. 19l3. 1,216,71 1. Patented Feb. 20; 1917.

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Patented Feb. 20, 1917.

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W. R MACKLIND. MECHANISM FOR REMOVING TREATED MATERIALS FROM DRIERS ANDTHE LIKE.

t APPLICATION FILED OCT. 2. 1913. 1,216,711.

Patentd Feb. 20, 1917.

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APPLICATION FILED OCT- 2. I9I3.

Patented Feb. 20,1917.

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i, D STATES PATENT OFFICE.

WILLIAM R. MACKLIND, CLEVELAND, OHIO.

MECHANISM FOR REMOVING TREATED MATERIALS FROM DRIEBS AND THE LIKE.

Specification of Letters Patent.

Patented Feb. 20, 1917.

Original application filed. August 10, 1912, Serial N 0. 714,323.Divided and this application filed October 2,

1913. Serial No. 793,050. r

T 0 all whom it may concern: h

Be it known that LAVILLIAM R. MACK- LIXD. a citizen of the UnitedStates. and a resident of Clevelanchcounty of Cuyahoga. and State ofOhio. have invented a new and useful Improvement in Mechanism forBemoving Treated Materials from Driers and the like. of which thefollowing is a specification. the principle of the invention beingherein explained and the best mode in which I have contemplated applyingthat principle. so as to distinguish it from other inventions.

The improved mechanism which forms the subject matter of interest hereinis designed primarily for removing and handling pulps, that is wetsludgy materials. both in mineral and vegetable products after they havebeen dried. A .pulp of the kind in mind is produced in the manufactureof white lead and lead oxid, zinc oxid and other pigments, and in dryingsuch a pulp the material is left in the form of a thin film on thedrying surface from which it requires to be removed before another layercan be deposited and the-drying operation continued. More specificallythe present improved mechanism is designed for use in the fashion justdescribed in connection with a continuous drying machine of the kindillustrated in my co-pending application filed August 10, 1912. SerialX0. 71%.323, out of which the present case has'been required to bedivided, such drying machine being characterized, among other things. bythe use of an aniiular drying table. It will be understood, however.that my improved mechanism for removing treated materials. while thusdesigned for use in conjunction with a drying machine of this type. mayalso be advantageously employed in, connection with other kinds ofdrying machines. and for that matter may be used in removing mate--rials from machines which treat such materials in other ways than bydrying the same.

'here the materials being dried. for ex ample. are lead products such ascertain of the pigments named above. it is desirable to provide againstthe escape of the material in the form of a powder into the surround ingatmosphere. The present improved mechanism. accordingly. has as itsobject not only the quick and thorough removal of the material from thesurface, 6. g. the drying table on which it has been treated, and

hollow so as to permit of steam being plied thereto in order to heat thetable.

the conveying of such removed material to the desired pointof discharge;but such 111iprovements also have as an object the 'preyention of theescape of poisonous products into the atmosphere, thus rendering it safefor the operators to work about the machine. To the accomplishment ofthe fore-- going -and related ends. said invention, then, consists ofthe means hereinafter fully described and particularly pointed outin theclaims.

The annexed drawings and the following description set forth in detailcertain mechanism or apparatus for removing the dried material; Fig. 3isa transverse sectional view of said removing apparatus taken on the line33, Fig. 2; Fig. iis a transverse sectional view of such conveyingmecha-- nism; Fig. 5 is a plan view, with 'parts shown in section. of asuction apparatus associated with such material removing apparatus anddesigned to prevent the escape of dust into the atmosphere incidentallyto the removal of the dried material from the drying table; and Fig. 6is a side elevationalview and partial section of such suction apparatus.

The general features of construction characterizing the drying machineshown in the foregoing drawings need be only briefly noted in thepresent connection. Such ma: chine comprises as its principal element andrying table A shown in transversesection in Fig. 1. Tliis'tableissupported by means of a series of suitable supporting stands 1. upon thefoundation 2, and is built up of a plurality of contiguous sectionswhich are sup- Pipes 6 and-7 are provided for respectively supplyingsteamto, and removing the water I annularsubstantially horizontallydisposed of condensation from, such hollow table sections, these pipesbeing radially disposed and connected at their inner ends to circularheaders 8 and 9 respectively.

In cooperative relation to said table are then provided a feedingapparatus for depositing onto the table a layer or film of the materialto be dried; an apparatus for removing the vapor and moisture arisingfrom the drying of suchdeposited material; and an apparatus for removingfrom the table the dried material and discharging the same from themachine. Of the foregoing, the only apparatus of present interest, aspreviously indicated, is the last named or material-removing mechanism,which will now be described.

Such removing mechanism is in the main carried in proper cooperativerelation to the annular table A by a rotatable frame (Fig.

' 1), although it will be understood that if found feasible, by reasonof variation in size, or for other reasons, to rotate the table insteadof the supporting frame, this may be very well done so far as theprinciples of operation involved are concerned. The cen-.

ter of said rotatable frame is 'a cast iron spider 1O rotatably mountedon a central column 11 having'a flanged top and a centering sleeve 12. Aplurality of arms 16, fabricated of structural steel, extend radiallyfrom said spider 10 to beyond the outer edge or periphery of the annulardrying table, such outer arm-ends being spaced from the surface of thetable a sufficient distance to provide the necessary clearness for theparts ter at p'oints substantially the same radial distance from thecentral a xis of the machine as the inner edge of the annular table. Itis not intended to support the entire weight of the rotatable frame fromthe central col- 'umn 11, but, at least in a large machine such as; theone illustrated, a circular track 19 is provided on the outer stands '1of the annular table. Upon this track, rollers 20,1nounted in brackets21 extending downwardly from the outer ends of the respective radialarms 16, are adapted to run.

The means for rotating the frame about its central axis form no part ofthe present invention and so are not illustrated, and the same may besaid of the apparatus for feeding the material onto the drying table Aand for removing the same, or vapor that arises from such material, asthe drying operation proceeds. It may be explained, however, that suchfeeding apparatus, and for that matter the vapor-removing apparatuslikewise, is carried by the same rotatable frame which supports thematerial-removing apparatus about to be described. Furthermore, thefeeding apparatus is located just behind the removing apparatus havingregard to the direction of rotation of the frame, so that as soon as thesurface of the table has been cleared of the previously deposited anddried material, a freshcoat of the wet untreated material may bedeposited thereon again and the drying operation thus continuedindefinitely in continuous fashion, as the frame with the aforesaidapparatuses rotates.

The apparatus for removing the dried material is shown in detail inFigs. 2 and 3 inclusive, and consists essentially of a brush adapted tocontact with the surface of the drying table A and followed by one ormore scrapers 71 which gather up the mavterial loosened by the brush,two such scrapers being employed in the machine illustrated. Both thebrush and the scrapers are inclosed in a tight casing 72 that surroundsthe same on. all sides having close fitting contact with the dryingtable at its outer and inner edges, and depending into substantialcontact with the surface of the same 011 either side of the removingapparatus. Such contact, in the case of the inner table edge, is securedwith the under surface of such edge, which projects beyond the body ofthe table with this object in view, the casing 72, or rather the hopper91 extending downwardly therefrom, being provided with an inwardly bentlip 73 faced with packing material. Close contact, in the case of thefront and back walls of the casing is preserved by means of strips 74:of flexible material that depend from said walls lower edges and dragalong the surface of the table (see Fig. 3). Such front and back wallsof the casing may be removed in order to obtain access to the brush andthe scrapers, respectively.

As shown in Figs. 1 and =1, the inner and outer ends of the brushspindle are carried in bearings 75 which may be made verticallyadjustable, whereby the degree of pressure exerted by the brush on thedrying table may be varied, as desired. Each scraper consists of a stripof thin metal attached to the lower edge of an angular trough member 76that is hung from the spindle 7 7 of a conveyer screw 78 disposed to fitsnugly in said trough member. Rods 7 9, connected with brackets 80 thatproject rearwardly from the conveyer troughs, ex-

escape.

ends with a series of sprockets 83. 81 and 85 which are connected with acorresponding series of sprockets on a jack-shaft 89 ing merely providedto insure the-thorough and complete removal of the material} Theconveyers T8. in operative conjunction with the scrapers. carry thematerial to the inner ends of the scraper troughs 76 so as to dischargethe material into a hopper 91 that is suspended from and integral withthe adjacent end of the casing 72 inclosing the removing apparatus. Thishopper has a close fitting contact with the under edge ofthe table. byvirtue of the lip 73 of the casing, previously described, so that nodust can Leading from the hopperis a conveyer trough 92. radiallydisposed with respect to the axis of the machine and having a screwconveyer 93 whereby the material received in said hopper 91 is carriedto an inner conical hopper 94 formed integrally in the central column 11whereon the rotatable frame of the machine is supported. This hopper 9-topens at its lower end into another conveyer 95 by means of which thematerial may be carried to any suitable discharge point away from themachine. The inner end of the conveyer 93. that extends from theremoving apparatus to this central hop- .per 94. desirably has a closefitting connection with the opening in the latter. which mustnecessarilyextend entirely around said hopper. Connection of the conveyer with thehopper is accordingly in the form of an annular closure 96 having atight fit ting contact with the lateral flanges 9? disposed above andbelow such opening. as shown in detail in Fig. 1. A'tight. dustproof fitbetween this. closu re and the flanges 97 is insured by the use ofpacking rings 98 thatare held in .contact with-the flanges by means ofresilient members 99.

The driving of the screw conveyer 93 is accomplished by means of thesame motor that drives the removing apparatus proper.

To this end another sprocket 100 is provided on jack-shaft 89 (Fig. 4:).said sprocket being connected with a sprocket 101 located below thetrough 92 that .is in turn ,con-

nected with the conveyerby intermediate.

gearing 102.

Despite the fact that the casing 7:2 that incloses the removingapparatus proper fits the drying table A as closely as possible.

there will. nevertheless. be some dust or finely powdered materialescape into the outer atmosphere unless addltional precautions be taken.Such additional precautions comprise a suction fan 103 (Figs. 1. 5 and6) connected to be driven from the same jack-shaft 89 as the removingapparatus and conveyer 93 just described. by means of a belt 10- Theintake to such dust fan leads from the casing 7:2 that incloses theaforesaid apparatus. while the discharge takes place into a dustcollector head. 105 from which depend a plurality of bags 106. offamiliar construction. which allow the air to pass readily through butretain any dust that maybe carried thereby. The lower ends of the bagsare normally tied shut, but when a sufiicient amount of dust accumulatestherein to render such procedure desirable. they may be raised. and bytying the bags at an intermediate point and opening such ends. such dustmay be dropped into the conveyer; a removable cover 107 being providedin the conveyer trough at acon venient point.

The preferred arrangement of intake is that shown in detail in Figs. 5and 6 and consists of two branched trunks or pipes 108. extending in ahorizontal direction over the casing 72 and increasing in diametertoward their fan-ends at each juncture of the branches 109 therewith.

By the foregoing described means the dust which is collected by the fanis joined to the bulk of the material that is directly carried 01f bythe removing apparatus. It will be understood that only a moderatesuction requires to be produced by the fan. the only object being toproduce a slight draftat the joints where the casing 72. that inclosesthe removing apparatus. fits the edges and surface of the drying table.This will serve to prevent any dust escaping into the outer atmospherewithout imposing on the vfan the duty of removing any. considerable"removing apparatus immediately precedes the feeding apparatus. suchremoving apparatus breaking up and carrying to the inner edge of theannular table the layer of material that had been deposited on the table011 the previous round- This dried material. as it drops over the inneredge of the table. is caught in the hopper. or. chute 91. and is thencecarried by conveyer 93 to the central hopper 9i. and so away out of themachine. o

By means of the suction fan 103, the air pressure within the casing 72.which incloses the aforesaid removing apparatus. is lowered sufficientlyto prevent the escape of any dust that-may be caused by the breaking upof the material under the action of the re-' the escape of dust isavoided and the material conveyed away from the machine without exposureof the operator in any way, is

highly important where poisonous materials are being handled, but indealing with any class of materials the elimination of dust contributesnot only to the comfort of the operators of the machine, but muchfacilitates the general operation. At the same time the mechanismprovided for removingthe material from the table surface is highlyefficient and capable of very rapid operation, all contributing torender the apparatus as a whole a very desirable one for use in theconnection in which it has been illustrated, as well as in various otherfields of service.

Other modes of applying the principle of my invention may be employedinstead of the one explained, change being made' as regards themechanism herein disclosed, provided the means stated by any of thefollowing claims or the equivalent of such stated means be employed.

I therefore particularly point out and distinctly claim as myinvention 1. In mechanism of the class described, the combination of anannular table; a hopper substantially centrally disposed with respectthereto; means movable in a circular path over said table and adapted toremove therefrom a layer of dried material; and conveying meansconnected with said first named means so as to travel therewith andextending radially inward from said table so as to convey such removedmaterial to said hopper as fast as removed from said table.

2. In mechanism of the class described, the combination of an annulartable; a. hopper substantially centrally disposed with respect thereto;means movable in a circular path over said table, said means beingadapted to loosen a layer of dried material on said table and to removethe same to the inner edge of the latter; and conveying means connectedwith said first named means so as to travel therewith and extendingradially inward from said table so as to convey such material from theinner edge thereof to said hoppervas fast as removed from said table.

3. In mechanism of the class described,

the combination of an annular table; a hopper substantially centrallydisposed with respect thereto; means supported so as to be movable in acircular path over said table and adapted to remove therefrom a layer ofmaterial, said means comprising a radially disposed brush and a scraperfollowing the same, both adapted to contact with said table; andconveying means connected with said scraper so as to travel therewithand extending radially inward from said table to said hopper so as toconvey such material from said table to said hopper as fast as removed.

4. In mechanism of the class described, the combination of an annulartable; a hop per substantially centrally disposed with respect thereto;means supported so as to be movable in a circular path over said tableand adapted to remove therefrom a layer of material, said meanscomprisinga radially disposed brush and a scraper following the same,both adapted to contact with said table; a conveyer extending lengthwiseof said scraper and adapted to convey material received on the latter tothe inner edge of said table; and another conveyer connected to travelwith said scraper and extending from the inner edge of said table tosaid hopper, said last named conveyer being adapted to receive thematerial from said first conveyer and transfer the same to said hopperas fast as removed.

5. In mechanism of the class described. the combination of an annulartable; means supported so as to be movable in a circular path over saidtable and adapted to remove therefrom a layer of material, said meanscomprising a plurality of radially disposed scrapers following one afterthe other; a conveyer extending lengthwise of each of said scrapers andadapted to convey material received on the latter to the inner edge ofsaid table; and another radially disposed conveyer connected to travelwith said scrapers and adapted to receive such material therefrom, saidlast named conveyer exsupported soas to be movable in a circular f pathover said table and adapted to remove therefrom a layer of material,said means comprising a radially disposed brush and a plurality ofscrapers following the same,

one after the other; a conveyer extending 13a lengthwise of each of saidscrapers and adapted to convey material received on the latter to theinner edge of said table; and another radially disposed conveyerconnected to travel with said scrapers and adapted to receive suchmaterial therefrom, said lastnamed conveyer extending toward the centralaxis of said table.

8. In mechanism of the class described, the combination of an annulartable; a hopper substantially centrally disposed with respectthereto;means adapted to remove a layer of material from said table, said meanscomprising a radially disposed brush and a scraper following the same,bothl adaptedto contact with said table; and other means connected withsaid scraper so as to travel therewith and adapted to convey suchremoved material to said hopper.

9. In mechanism of the class described, the combination of an annulartable means movable in a circular path over said table and adapted toremove therefrom a layer of the dried material; other means adapted toconvey such removed material toward the axis of said table; a casinginclosin said removing means and having a close-htting contact with saidsurface; and other means adapted to lower the air-pressure in said 10.In mechanism of the class described, the combination of an annulartable; means movable in a circular path over said table and adapted toremove, therefrom a layerof the dried material other means adapted toconvey such removed material toward the axis of said table a casinginclosing said removing means and having a close-fitting contact withsaid surface; a suction fan connected with said casing; and meansadapted to collect any dust in the air withdrawn from said casing bysaid fan, said dust-collecting means being adapted to discharge such(lust into said conveying means.

11. In mechanism of the class described, the combination of an annulartable; a column centrally disposed with respect to said table; a hopperin said column having an opening encircling the same; a frame rotatablysupported upon said column and extending over said table; means carriedby said frame in operative relation to said table and adapted to removematerial therefrom; and conveying means also carried by said frame, saidconveying means leading from said removing means and discharging intosaid hopper openin 12. In mechanism of the class described, thecombination of an annular table; a column centrally disposed withrespectto said table; a hopper in said column having an opening encircling thesame; a frame rotatably supported upon said column and extending oversaid table; means carried by said frame in operative relation to saidtable and adapted to remove material therefrom; a casing inclosing saidremoving means and having a tight-fitting contact with said table:conveying means alsocarried by said frame. said conveying means leadingfrom said removing means and discharging into said hopper opening; and aclosure for said opening rotatable with said frame.

13. In mechanism of the class described, the combination of an annulartable; a column centrally disposed with respect to said table; a hopperin said column having an opening encircling the same; a frame rotatablysupported upon said column and extending over said table; means carriedby said frame in operative relation to said table and adapted to removematerial therefrom: a casing inclosing said removing means and having atight-fitting contact. with said table; conveying means also carried bysaid frame, said conveying means leading from saidv removing means anddischarging into said hopper opening; a closure for said openingrotatable with said frame; and a suction fan mounted on said frame andconnected with said casing.

11. In mechanism of the class described, the combination of an amiulartable; a column centrally disposed with respect to said table; a hopperin said column having an opening encircling the same; a framerotatablysupported upon said column and extending over said table; means carriedby said frame in operative relation to'said table and adapted to removematerial therefrom; a casing inclosing said removing means and having atight-fitting contact with said table; conveying means also carried bysaid frame, said conveying means leading from said removing means anddischarging into said hopper opening; a closure for said openingrotatable with said frame: a suction fan mounted on said frame andconnected with said casing; and means adapt-ed to collect any dust inthe air withdrawn from said casing by said fan, said dust-collectingmeans including a bag depending over and adapted to be emptied into saidconveying means.

15. In mechanism of the class described, the combination with a table;of relatively movable means for removing the dried material therefrom,said means comprising a rotary brush and a scraper following the same,both adapted to contact with said table; a casing inclosing said brushand scraper; and a suction fan connected with said casing and adapted tolower the air pressure therein.

16. In mechanism of the class described, the combination with a table;of relatively movable means for removing the material therefrom. saidmeans including an angular trough tiltable about a longitudinallyextending axis, a scraper attached to one edge of said trough andadapted to contact with said table, resilient means connected withsaith-trough to hold said scraper in such contact, and a screw-conveyerextending lengthwise ofsaid trough.

17. In mechanism of the class described, the combination with a table;of relatively movable means for removing the material therefrom, saidmeans including an angular trough tiltable about a longitudinallyextending axis, a scraper attached to one edge of said trough andadapted to contact with said table, resilient means connected with saidtrough to hold said scraper in such contact, means adapted to adjust thepressure exerted by said resilient means, and a conveyer extendinglengthwise of said trough.

18. The combination of an annular table, a hopper located substantiallyat the center of said table, a rotatably mounted closure for saidhopper, and conveying means extending from the inner edge of said tableto said hopper closure and movable circularly along such table edge.

19. The combination of an annular table; a hopper located substantiallyat the center of said table; a rotatably mounted closure for saidhopper; a conveyer extending from the inner edge of saidtable to saidhopper closure and movable circularly along such edge; and means movablein a circular path over said table in unison with said conveyer andadapted to remove material from said table and discharge the same intosaid conveyer.

20. The combination of an annular table;

a hopper located substantially at the center of said table; a rotatablymounted closure for said hopper, a conveyer extending from the inneredge of said table to said hopper closure and movable circularly alongsuch edge; means movable in a circular path over said table in unisonwith said conveyer and adapted to remove material from said table anddischarge the same into said conveyer; and a casing inclosing saidremoving means.

21. The combination of an annular table; ahopper located substantiallyat the center of said table; a rotatably mounted closure for saidhopper; a conveyer extending from the inner edge of said table to saidhopper closure and movable circularly along such edge; means movable ina circular path over said table in unison with said conveyer and adaptedto remove material from said table and discharge the same into saidconveyer; a casing inclosing said removing means and having aclose-fitting contact with the surface of said table; and other meansadapted to lower the air-pressure in said casing.

22. The combination of an annular table; a hopper located substantiallyat the center of said table a rotatably mounted closure for said hopper;a conveyer extending from the inner edge of said table to said hopperclosure and movable circularly along such edge; means movable in acircular path over said table in unison with said conveyer and adaptedto remove material from said table and discharge the same into saidconveyer; a casing inclosing said removing means and having aclose-fitting contact with the surface of said table; and a suction fanconnected with said casing.

Signed by me, this 29th day of September, 1913.

WVILLIAM R. MACKLIND.

Attested by:

OLIvER Box, JONATHAN E. INGERSOLL.

